Manufacture of cast type bars



Feb. 26, 1935. CEUPPENS 1,992,811

MANUFACTURE OF CAST TYPE BARS Filed Sept. 16, 1933 Patented Feb. 26,1935 UNITED STATES PATENT orrlce- MANUFACTURE OF CAST TYPE BARS ModestoCeuppens, Brussels, Belgium, assignor to Linotype and Machinery Limited,London, 7

England, a British company Application September 16, 1933, Serial No.689,714 In Great Britain September 23, 1932 6 Claims.

of by the formative cavities in the matrices.

' The formative cavities of the matrices usually employed are in theform of rectangular recesses bearing the character in intaglio at thebottom of the recess.

The casting of slugs bearing characters of the larger body dimensions isfrequently effected by using a mold of a smaller body dimension than thecharacters, the face of each slug being th n produced with a characterbearing portion overhanging the body portion; alternatively, slugs withcharacters of the larger body dimensions are cast in recessed molds, bywhich the wellknown ribbed slugs are produced. In both these cases, themetal on injection into the mold does not pass directly into theformative cavities of the matrices, and being diverted by coming intocontact with the side edges of the matrices fails to reachthe bottom ofthe formative cavities under an even pressure at all parts thereof, sothat the character face of each slug is not of uniform strengththroughout.

Moreover, in the case of slugs where the characters overhang the body toa considerable extent, the slugsuare' of .very weak construction,inasmuch as, at the point of connection thereto ofthe characters(particularly those characters which have no ascenders) the slugs are oflittle more than paper thickness. Slugs of that construction are veryeasily damaged or deformed under the pressure to which they are exposedwhen used for indenting fiongs for the subsequent production therefromof stereotype printing plates, and the ribbed slugs are also liable todamage under similar conditions at the abovementioned weak parts of thecharacter faces.

The object of the present invention is to overcome the difiiculties. Tothat end it involves the routing out of portions of the matrices whichare employed for the casting of characterswithout ascenders, so that atthe casting faces of the matrices, the formative cavities are widened atthe part adjacent the upper edges of the characters.

The invention will now be described with reference to the accompanyingdrawing in which:-

Figure l is a perspective view of a matrix of standard constructionadapted to cast a character which is overhung from the slug and which isdevoid of the support afforded by the use of the present improvements; 1

Figure 2 is a perspective view of portion of a slug cast from a line ofmatrices such as that shown in Figure 1;

Figure 3 is a transverse vertical section on the plane indicated by thecrooked'line 3-3 of Figure 2 i Figure 4 is a perspective view of amatrix according to the present invention;

Figures 5 and 6 are views respectively similar to Figures 2 and 3, of aslug with the improvements resulting from the casting from matrices suchas shown in Figure 4, the plane on which Figure 6 istaken, being thatindicated by the crooked dotted line 6-6 of Figure 5;

Figure 7 is a vertical section showing the positional relationshipbetween the mold slot and the formative cavity of a matrix, forproducing a slug of the section shown in Figure 3; and

Figure 8 is a view showing a similar relationship in connectionwith theproduction of improved slugs such as shown in Figure 6.

Like reference numerals are used to indicate like or corresponding partsthroughout the different figures of the drawing.

The matrices 1 involved in this invention are those which, whenpresented to the casting mold 2, see Figures 7 and 8, present part ofthe formative cavity 3, in offset relationship to the mold slot 4 inorder that the resultant cast slug 5 will have itscharacter-bearing,portion 5 correspondingly offset from the body portion5, as indicated in Figures 3 and 6. For such casting, the mold isusually of smaller body dimension than the characters, but for castingslugs with characters of the larger body dimensions there are generallyused recessed molds which result in the production of ribbed slugs;these ribbed slugs are so well known that it is believed that thefollowing description which deals particularly with the casting of slugsof the smaller body dimensions, will suffice for a clear understandingof the application of the invention to the production of these largerslugs.

By referring to Figure 1 it will be noted that the routing of theformative cavity 3 is of substantially rectangular form with thecharacter 3 in intaglio at the bottom of the routed recess, thecharacter here selected for illustration being one which has noascender. When a composed line containing such a matrix is presented tothe casting mold for producing an overhung slug such as shown in Figure2, the formative cavity 3 of that matrix is almost completely cut offfrom connection with the mold slot 4 as shown in Figure 7, so that theflow of metal into that cavity is seriously impeded by having to comeinto contact first with the edge of the matrixbelow' the cavity andthence be diverted into said cavity. This results in failure of themetal to reach the bottom of all the formative cavities under an evenpressure, so that the character-bearing face of the slug is not ofuniform strength throughout.

But, as next explained the chief objection incidental to the use of thematrices just previously dealt with, lies in the weakness presented bythe extreme tenuity of the neck 5'" where: the overhang 5 unites withthe body 5. Slugs so formed, are very easily damaged or deformed underthe pressure to which they are exposed when used for'indenting fiongsrequired for the subsequent production of stereotype printing plates.Characters which have ascenders are not, however, fraught with the samedanger for the reason that those ascenders extend across the tops of theslug bodies and therefore present a stout body of metal sufficient toprevent damage under the aforesaid pressure.

The main object of the present invention is so to shape the matrices ofnon-ascender characters, as to ensure that the parts of the over-hungslugs bearing those characters shall be united to the slug bodies by asuflicient bulk of metal to prevent them from being deformed under anypressure to which they may be ordinarily subjected in the course ofstereotype production. Tothat end the wall of the recess 3 of each ofthe pertinent matrices (it is the wall corresponding to the ascenderside of ascender matrices) is splayed outwards as shown at 6, so that aresultant slug will have its non-ascender characters united to the slugbody 5 by a fairly substantial fillet of metal as at 5 Figures 5 and 6'sufficient to attain the desired rigidity.

It is to be understood that the routing at 6, may be of any desired formso as to produce fillets of the wedge shape indicated in the drawing, orof curved or other form.

Having described my invention, I declare that what I claim and desire tosecure by Letters Patent is:

1. In or for a typographical composing and line casting machine adaptedto produce slugs with type characters overhanging the slug bodies, amatrix for casting a character having no ascender, characterized by therecess which is provided with the character-forming surface beingwidened at the side adjacent to the top of the character to the sameextent as the recesses in a matrix for casting a character having anascender so as to produce a metal fillet which extends more or lessacross the top of the slug and unites together the overhanging and bodyportions of the slug.

2. A slug bearing typographical characters overhanging the slug body,characterized by those parts of the slug which bear characters having noascenders, being reinforced by metal fillets which extend more or lessacross the top of the slug body to a point substantially coterminouswith the ends of characters having ascenders and unite together thoseparts of the slug and said slug body.

3. In a typographical composing and line casting machine adapted toproduce slugs with type characters overhanging the slug bodies, a matrixfont including matrices formed on their casting edges with routingnotches containing in their bottoms characters with and withoutascenders, the routing notches of matrices having characters withoutascenders being extended to have one side substantially coincident withthe constant line of the mold to produce a slug having a uniformoverhang and reinforcing fillets for said characters without ascenders.

i. A matrix font as set forth in claim 3, wherein the extended portionsof the routing notches of matrices having characters without ascendersslope from the bottoms of the notches toward the casting edges of thematrices to produce a correspondingly sloped fillet.

5. In a typographical composing and line casting machine adapted toproduce slugs with type characters overhanging the slug bodies, a matrixfont comprising matrices formed on their casting edges with routingnotches containing characters in their bottoms, some of the matricesbearing upper case characters and some lower case characters, and therouting notches of all of the matrices being of uniform vertical extentto produce a uniform overhang and reinforcing fillets for lower casecharacters without ascenders.

6. A slug bearing typographical characters overhanging the slug body,characterized by the uniform overhang of the characters and by thoseoverhanging parts of the slug which bear characters having no ascendersbeing reinforced by tapering metal fillets which extend across the slugbody to a point substantially coterminous with the ends of charactershaving ascenders and unite together said parts and the slug body.

MODESTE CEUPPENS.

